Background
Dyslipidemia is an independent health risk of cardiovascular disease (CVD), a leading cause of mortality in older adults. Despite their importance, there have been few reports on the association between lipoprotein cholesterol and future CVD and cardiovascular (CV) mortality among elderly Asians. This longitudinal study investigated the correlations in an elderly Korean population by using a large nationwide sample.
Methods
Among participants in the cohort database of the Korean National Health Insurance Service who completed the National Screening Program, a total of 62,604 adults aged 65 years or older (32,584 men and 30,020 women) were included. High-density lipoprotein cholesterol (HDL-C) and low-density lipoprotein cholesterol (LDL-C) values were categorized by quartiles. Cox proportional hazard models were used to assess the association between the quartiles of lipoprotein cholesterol and CV events or CV mortality.
Results
The mean follow-up period was 3.3 years. The incidence rates of ischemic heart disease and ischemic brain disease were 0.97 and 0.61 per 1,000 person-years, while the mortality rates from these diseases were 0.22 and 0.34 per 1,000 person-years, respectively. In a fully adjusted model, high HDL-C and LDL-C levels were not associated with the total CV events and CV mortality; however, high LDL-C levels were significantly associated with a lower incidence of ischemic brain disease. Furthermore, diabetic patients with high LDL-C were more likely to have higher CV mortality, whereas non-smokers with high LDL-C were less likely to be at risk of CV events.
Conclusions
Neither high LDL-C nor HDL-C was significantly associated with future CV mortality in older adults aged ≥65 years. Older adults with diabetes were significantly associated with a higher risk of CV mortality in high LDL-C levels.

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Background
Dyslipidemia is an independent health risk of cardiovascular disease (CVD), a leading cause of mortality in older adults. Despite their importance, there have been few reports on the association between lipoprotein cholesterol and future CVD and cardiovascular (CV) mortality among elderly Asians. This longitudinal study investigated the correlations in an elderly Korean population by using a large nationwide sample.
Methods
Among participants in the cohort database of the Korean National Health Insurance Service who completed the National Screening Program, a total of 62,604 adults aged 65 years or older (32,584 men and 30,020 women) were included. High-density lipoprotein cholesterol (HDL-C) and low-density lipoprotein cholesterol (LDL-C) values were categorized by quartiles. Cox proportional hazard models were used to assess the association between the quartiles of lipoprotein cholesterol and CV events or CV mortality.
Results
The mean follow-up period was 3.3 years. The incidence rates of ischemic heart disease and ischemic brain disease were 0.97 and 0.61 per 1,000 person-years, while the mortality rates from these diseases were 0.22 and 0.34 per 1,000 person-years, respectively. In a fully adjusted model, high HDL-C and LDL-C levels were not associated with the total CV events and CV mortality; however, high LDL-C levels were significantly associated with a lower incidence of ischemic brain disease. Furthermore, diabetic patients with high LDL-C were more likely to have higher CV mortality, whereas non-smokers with high LDL-C were less likely to be at risk of CV events.
Conclusions
Neither high LDL-C nor HDL-C was significantly associated with future CV mortality in older adults aged ≥65 years. Older adults with diabetes were significantly associated with a higher risk of CV mortality in high LDL-C levels.

Figure 1

Figure 2

Figure 3
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